Four new species of the genus Otacilia Thorell, 1897 from Hunan Province, China (Araneae, Phrurolithidae)

Chi Jin; Lina Fu; Xiangchu Yin; Feng Zhang

doi:10.3897/zookeys.620.7982

Abstract

Four new species of the genus Otacilia Thorell, 1897 are reported from Hunan Province, China: Otacilia hippocampa sp. n., Otacilia yangmingensis sp. n., Otacilia curvata sp. n., and Otacilia submicrostoma sp. n. All new species are described based on both sexes. In addition, the 55 known Otacilia species are divided into four species groups.

Keywords

Description, diagnosis, etymology, morphology, taxonomy

Introduction

Phrurolithidae Banks, 1892 was elevated to family rank by Ramírez (2014), consistent with the suggestion of Deeleman-Reinhold (2001). The family is currently represented by 211 species belonging to 14 genera worldwide. Of these, four genera and 65 species are recorded from China (World Spider Catalog 2016, Fu et al. 2015, Fu et al. 2016a, b). The Phrurolithidae are mostly ground-dwelling spiders living in leaf litter, especially bamboo leaves, woody debris or on the forest floor, very few species are found in the canopy (Deeleman-Reinhold 2001; Fu et al. 2014).

Otacilia Thorell, 1897 is one of the species-rich genera of the family comprising 55 species distributed in south-east Asia and east Asia. Among these Otacilia species, 35 are reported from China (Fu et al. 2015, Fu et al. 2016a, Fu et al. 2016b). The genus Otacilia was established by Thorell (1897) with description of O. armatissima based on a single female specimen from Myanmar.

The genus Otacilia is closely related to Phrurolithus C. L. Koch, 1839, comprising 74 species mostly distributed in the holarctic region. Until now, there is no clear way to differentiate between Otacilia and Phrurolithus. The diagnostic characters provided by Kamura (2005) were inaccurate (Wang et al. 2015), and the differences listed by Jäger and Wunderlich (2012) were also not distinct with the addition of more new species of these two genera.

Wang et al. (2015) listed ten Chinese Otacilia species in two groups. Subsequently, Fu et al. (2016b) reviewed the 31 Chinese Otacilia species and agreed with Wang et al.’s (2015) assignment and also established a third species group to accommodate the Otacilia species: the armatissima group, the revoluta group, and the pseudostella group.

While examining the collections from Hunan Province, China, some Otacilia specimens were found that differed from the currently known Otacilia species. They are identified as four new species, Otacilia hippocampa sp. n., Otacilia yangmingensis sp. n., Otacilia curvata sp. n., and Otacilia submicrostoma sp. n., and are described and illustrated here.

Material and methods

The terminology used follows Jäger and Wunderlich (2012). All measurements given in the text are in millimeters. Total length is the sum of the carapace and abdomen lengths, regardless of the pedicel. Eye sizes were measured as the maximum diameter in dorsal or frontal view. Leg measurements are shown as: total length (femur, patella, tibia, metatarsus, tarsus). Epigyne were removed and cleared in a warm solution of 10% potassium hydroxide (KOH), transferred to ethanol and temporarily mounted for drawing. All specimens are preserved in 75% alcohol and were examined, drawn, and measured under a Leica M205A stereomicroscope equipped with an Abbe drawing device. Photographs were taken using a Leica M205A stereomicroscope equipped with a DFC450 CCD. The specimens are deposited in the Museum of Hebei University, Baoding, China (MHBU).

Abbreviations

ALE anterior lateral eyes

AME anterior median eyes

a.s.l. above sea level

B bursa

C conductor

CD copulatory duct

CO copulatory opening

CT connecting tube

DTA dorsal tibial apophysis

E embolus

FA femoral apophysis

FD fertilization duct

GA glandular appendage

MOA median ocular area

MP median plate

PLE posterior lateral eyes

PME posterior median eyes

RTA retrolateral tibial apophysis

S spermatheca

TA tegular apophysis

Taxonomy

Phrurolithidae Banks, 1892

Otacilia Thorell, 1897

Diagnosis

Chelicerae each with two bristles (rarely with one bristle) on anterior side; leg formula: 4123 (rarely 1423); spination: femora I–II d 0–2, III–IV d 0–1, I pl 3–6, II pl 0–3; tibiae I–II usually with 6–8 pairs of ventral spines; tibia I always one more rv than pv spine and tibia II always one more pv than rv spine; metatarsi I–II usually with 3–4 pairs of ventral spines, and always one more pv than rv spine.

Male palp: femur with ventral apophysis or hump; tibia usually with single strong RTA, some species with BTA or DTA; embolus hook-shaped or needle-like, originating antero-prolaterally; tegular apophysis sclerotized or transparent, present or absent, antero-retrolaterally located; conductor membranous, well developed or absent. Female genitalia: epigynal median plate distinct or absent; vulva with pair of transparent bursae anteriorly and pair of strongly sclerotized spermathecae posteriorly.

Species groups of Otacilia

After reviewing 59 Otacilia species (including the four new Chinese species described in this paper), the grouping was revised and the current species assigned to four groups based on assessment of Fu et al. (2016b). The revoluta group was divided into two new groups, the longituba group (16 species) and the ambon group (two species). The armatissima group (29 species) and the pseudostella group (nine species) were preserved and updated. Three species were not assigned to any group because of their poor original description and figures or peculiar structure: Otacilia luzonica (Simon, 1898) (female is unknown; description and figures are not diagnostic), O. papilla Dankittipakul & Singtripop, 2014 (male is unknown; epigyne medially with lobe and absence of bursae) and O. paracymbium Jäger & Wunderlich, 2012 (female is unknown; cymbium with paracymbium).

Here the male and female diagnostic characters are listed for each species group, followed by a list of all of the included Otacilia species (Table 1).

Table 1.

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Definition of species groups of Otacilia species, together with lists of included species (species marked with an asterisk are reported from China).

Species group name	Diagnostic Character	Included Species
armatissima	1) Palpal organ with a distinct sclerotized TA or membranous conductor; embolus hook-shaped. 2) Epigyne with a distinct median plate, without concavity; CO slocated anteriorly or medially, higher than the spermathecae; CD (the left one from the ventral view) anti-clockwise from the CO; connecting tube usually crescent-shaped; spermathecae separated by more than half a spermatheca’s diameter.	1) O. armatissima Thorell, 1897 2) O. bawangling Fu, Zhang & Zhu, 2010* 3) O. biarclata Fu, He & Zhang, 2015* 4) O. bicolor Jäger & Wunderlich, 2012 5) O. florifera Fu, He & Zhang, 2015* 6) O. forcipata Yang, Wang & Yang, 2013* 7) O. foveata (Song, 1990)* 8) O. fujiana Fu, Jin & Zhang, 2014* 9) O. hengshan (Song, 1990)* 10) O. jianfengling Fu, Zhang & Zhu, 2010* 11) O. kao Jäger & Wunderlich, 2012 12) O. komurai (Yaginuma, 1952)* 13) O. limushan Fu, Zhang & Zhu, 2010* 14) O. liupan Hu & Zhang, 2011* 15) O. luna (Kamura, 1994) 16) O. lynx (Kamura, 1994)* 17) O. macrospora Fu. Zhang & Zhang, 2016* 18) O. obesa Fu. Zhang & Zhang, 2016* 19) O. onoi Deeleman-Reinhold, 2001 20) O. papilion Fu, Zhang & Zhang, 2016* 21) O. pyriformis Fu, Zhang & Zhang, 2016* 22) O. sinifera Deeleman-Reinhold, 2001 23) O. songi Wang et al., 2015* 24) O. subliupan Wang et al., 2015* 25) O. taiwanica (Hayashi & Yoshida, 1993)* 26) O. truncata Dankittipakul & Singtripop, 2014 27) O. yangi Zhang, Fu & Zhu, 2009* 28) O. hippocampa sp. n.* 29) O. yangmingensis sp. n.*
ambon	1) Palpal organ without a distinct TA; the bulb is not pyriform but oval; embolus claw-like. 2) Epigyne without median plate and concavity; Cos located posterior, lower than the spermathecae; spermathecae well separated from each other by more than three spermatheca’s diameter.	1) O. ambon Deeleman-Reinhold, 2001 2) O. revoluta (Yin et al., 2004)*
longituba	1) Palpal organ without a distinct TA; conductor well developed or degenerated; embolus needle-like. 2) Epigyne without median plate and concavity; Cos located medially, higher than the spermathecae; CD (the left one from the ventral view) straight or slightly clockwise from the CO; spermathecae close together or separated by less than half a spermatheca’s diameter.	1) O. bifurcata Dankittipakul & Singtripop, 2014 2) O. christae Jäger & Wunderlich, 2012 3) O. flexa Fu, Zhang & Zhang, 2016* 4) O. longituba Wang, Zhang & Zhang, 2012* 5) O. loriot Jäger & Wunderlich, 2012 6) O. microstoma Wang et al., 2015* 7) O. mingsheng Yang, Wang & Yang, 2013* 8) O. mira Fu, Zhang & Zhang, 2016* 9) O. mustela Kamura, 2008 10) O. namkhan Jäger & Wunderlich, 2012 11) O. parva Deeleman-Reinhold, 2001 12) O. simianshan Zhou, Wang & Zhang, 2013* 13) O. vangvieng Jäger & Wunderlich, 2012 14) O. zebra Deeleman-Reinhold, 2001 15) O. curvata sp. n.* 16) O. submicrostoma sp. n.*
pseudostella	1) Palpal organ without a distinct TA; an apophysis present near embolic base (PEA); embolus needle-like. 2) Epigyne without indistinct median plate, but with a pair of shallow concavities; Cos located anteriorly or medially, higher than the spermathecae; spermathecae separated by more than one spermatheca’s diameter.	1) O. acuta Fu, Zhang & Zhang, 2016* 2) O. aurita Fu, Zhang & Zhang, 2016* 3) O. digitata Fu, Zhang & Zhang, 2016* 4) O. leibo Fu, Zhang & Zhang, 2016* 5) O. ovata Fu, Zhang & Zhang, 2016* 6) O. pseudostella Fu, Jin & Zhang, 2014* 7) O. stella Kamura, 2005 8) O. vulpes (Kamura, 2001) 9) O. zhangi Fu, Jin & Zhang, 2014*
the others		1) O. luzonica (Simon, 1898) 2) O. papilla Dankittipakul & Singtripop, 2014 3) O. paracymbium Jager & Wunderlich, 2012*

Otacilia hippocampa sp. n.

http://zoobank.org/C336230A-1FD5-435C-BA9C-13657E682F6F

Figs 1, 2, 3

Type material

Holotype ♂, China, Hunan Province: Dao County, Qingtang Town, Dajiangyuan Village, Mt. Jiucailing (25°27'37.678"N, 111°21'12.499"E), 448 m a.s.l., 29 September 2015, Chi Jin leg. Paratypes: 2♀2♂, same data as for holotype.

Etymology

The species name is taken from the Latin generic name of the seahorse, “Hippocampus”, referring to the seahorse-shaped internal ducts (copulatory duct, connecting tube and spermatheca) in the female epigyne; adjective.

Diagnosis

The male can be distinguished from all other armatissima group species, except O. bicolor Jäger & Wunderlich, 2012, O. onoi Deeleman-Reinhold, 2001 and O. truncata Dankittipakul & Singtripop, 2014, by having a long DTA and can be distinguished from these three species by the absence of conductor (Figs 2A–D, 3A–C). The female of the new species can be easily distinguished from all of the other armatissima group species by the seahorse-shaped internal ducts (except the bursae), whereas they are S-shaped or crescent-shaped in the other congeners (Figs 2E–G, 3D–E).

Description

Male (Fig. 1A–B). Total length 2.17–2.65 (n = 3). Holotype: body 2.65 long; carapace 1.28 long, 1.12 wide; abdomen 1.37 long, 0.90 wide. Carapace yellowish brown, with black marginal bands; fovea longitudinal, brown. Eye diameters: AME 0.08, ALE 0.09, PME 0.08, PLE 0.09. Eye interdistances: AME–AME 0.02, AME–ALE 0.01, PME–PME 0.09, PME–PLE 0.05, ALE–PLE 0.07. MOA 0.19 long, front 0.17 wide, back 0.25 wide. Clypeus 0.14 high. Chelicerae with two strong anterior bristles; promargin with three well-separated teeth, and retromargin with two teeth close to each other. Labium and sternum dark yellow. Legs light yellowish brown; all femora with distal black distal annulus; patellae I–II black, patellae III–IV with distal black annulus; tibiae I–II almost all black, tibiae III–IV with black distal annulus; metatarsi I–II distal half part black, metatarsi III–IV with black distal annulus. Measurements of legs: leg I 4.95 (1.29, 0.49, 1.39, 1.23, 0.55), II 4.09 (1.11, 0.46, 1.01, 0.98, 0.53), III 3.59 (0.91, 0.44, 0.74, 0.94, 0.56), IV 5.19 (1.36, 0.45, 1.14, 1.49, 0.75). Leg formula: 4123. Femur I with two dorsal spines and three prolateral spines, femur II with one dorsal spine and two prolateral spines, femur III lacks dorsal spine, femur IV with one dorsal spine; tibia I with six proventral spines and seven retroventral spines, tibia II with six pairs of ventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Femora I–III lack dorsal spines, femur IV four with one dorsal spine, femur I with three prolateral spines; tibia I with six proventral spines and seven retroventral spines, tibia II with six proventral spines and five retroventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen oval, dorsum light grey, with several chevron-like black stripes, anterior half with a small dorsal scutum; venter light grey.

Figure 1.

Otacilia hippocampa sp. n. A male habitus, dorsal view B same, ventral view C Female habitus, dorsal view D same, ventral view.

Palp (Figs 2A–D, 3A–C). Femur distally with an inflated hump on ventral side and a retrolateral concavity. RTA basally thick, tapering to a sharp apex, bent prolaterally. DTA shaped similarly to RTA, with one spine basally. Embolus short, needle-like. Conductor absent. Tegular apophysis triangular, sclerotized.

Figure 2.

Otacilia hippocampa sp. n. A left male palp, ventral view B same, dorsal view C same, prolateral view D same, retrolateral view E epigyne, ventral view F same, cleared by potassium hydroxide, ventral view G vulva, dorsal view.

Figure 3.

Otacilia hippocampa sp. n. A left male palp, ventral view B same, dorsal view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view. Scale bars equal for A and B, equal for D and E.

Female (Fig. 1C–D). Total length 2.56–2.96 (n = 2). One paratype: body 2.96 long; carapace 1.47 long, 1.22 wide; abdomen 1.49 long, 0.99 wide. Eye diameters: AME 0.07, ALE 0.09, PME 0.08, PLE 0.10. Eye interdistances: AME–AME 0.03, AME–ALE 0.01, PME–PME 0.09, PME–PLE 0.06, ALE–PLE 0.09. MOA 0.22 long, front 0.18 wide, back 0.27 wide. Clypeus 0.13 high. Leg measurements: I 5.40 (1.41, 0.58, 1.54, 1.32, 0.55); II 4.53 (1.21, 0.53, 1.16, 1.04, 0.59); III 3.96 (1.04, 0.46, 0.81, 1.02, 0.63); IV 5.63 (1.46, 0.50, 1.27, 1.60, 0.80). Leg formula: 4123. Leg spination as in male. Abdomen light grey, anterior half lacks dorsal scutum. Other characters as in male.

Epigyne (Figs 2E–F, 3D): median plate narrow, with parallel lateral margin; copulatory openings situated centrally, tiny and pore-like. Vulva (Figs 2G, 3E–F): copulatory ducts short, connected with a pair of slender tubes leading to the large, transparent ovoid bursae; spermathecae located posteriorly, small and ovoid, separated by more than one spermatheca’s diameter; connecting tubes curved and sigmoid. Glandular appendages absent.

Distribution

Known only from the type locality, Hunan, China (Fig. 13).

Otacilia yangmingensis sp. n.

http://zoobank.org/9FA1C1B9-0F0B-455C-B1D8-E17B2897AA68

Figs 4, 5, 6

Type material

Holotype ♂, China, Hunan Province: Shuangpai County, Mt. Yangming, Wanshou Temple (26°06'27.490"N, 111°55'19.186"E), 1375 m a.s.l., 26 September 2015, Chi Jin leg. Paratypes: 5♀4♂, same data as for holotype; 1♂, Shuangpai County, Mt. Yangming, Hongjun Pavilion (26°04'34.924"N, 111°56'19.223"E), 1324 m a.s.l., 27 September 2015, Xiangbo Guo leg.; 1♂, Jiangyong County, Qianjiadong Town, Daboshui (25°24'25.70"N, 111°19'04.33"E), 224 m a.s.l., 3 October 2015, Jingchao He leg.

Etymology

The species name refers to the holotype locality; adjective.

Diagnosis

The male can be distinguished from all other armatissima group species, except O. macrospora Fu. Zhang & Zhang, 2016, by the RTA base with a triangular process dorsally and by the absent DTA and can be distinguished from it by the long needle-like embolus (embolus stout and hook-shaped in O. macrospora) and the thumb-shaped tegular apophysis (tegular apophysis sickle-shaped in O. macrospora) (Figs 5A–B, 6A–B; Fu et al. 2016a: figs 16, 18, 22–23). The female of the new species can be distinguished from all other armatissima group species, except O. macrospora Fu, Zhang & Zhang, 2016, by the copulatory openings connected with a pair of shallow concavities anteriorly, and the concavities have distinct anterior and inner lateral margins, and can be distinguished from it by the median plate (narrower than that of O. macrospora) and bursae (long ovoid, whereas they are spherical in O. macrospora) (Figs 5E–G, 6D–E; Fu et al. 2016a: figs 20–21, 25–26).

Description

Male (Fig. 4A–B). Total length 3.04–3.16 (n = 7). Holotype: body 3.16 long; carapace 1.58 long, 1.31 wide; abdomen 1.58 long, 0.97 wide. Carapace light yellowish brown, lateral margin black, middle with broad longitudinal black stripe, from ocular area to the posterior margin of carapace; fovea longitudinal, distinct. Eye diameters: AME 0.11, ALE 0.12, PME 0.10, PLE 0.10. Eye interdistances: AME–AME 0.03, AME–ALE 0.01, PME–PME 0.10, PME–PLE 0.05, ALE–PLE 0.09. MOA 0.25 long, front 0.23 wide, back 0.27 wide. Clypeus 0.14 high. Chelicerae with two strong anterior bristles; promargin with three well separated teeth and retromargin with six denticles close to each other. Labium and sternum light yellow. Legs light yellowish brown. Leg measurements: leg I 6.65 (1.66, 0.61, 1.89, 1.65, 0.84), II 5.36 (1.42, 0.47, 1.43, 1.29, 0.75), III 4.56 (1.22, 0.49, 1.01, 1.20, 0.64), IV 7.38 (2.00, 0.58, 1.75, 2.08, 0.97). Leg formula: 4123. Femur I with two dorsal spines and four prolateral spines, femur II with one dorsal spine and two prolateral spines, femora III–IV with one dorsal spine; tibia I with seven proventral spines and eight retroventral spines, tibia II with seven pairs of ventral spines; metatarsi I–II with four pairs of ventral spines. Abdomen oval, dorsum black, anterior half with a narrow dorsal scutum, posterior half with several black transversal stripes; venter light grey, with black longitudinal stripes.

Figure 4.

Otacilia yangmingensis sp. n. A male habitus, dorsal view B same, ventral view C Female habitus, dorsal view D same, ventral view.

Palp (Figs 5A–D, 6A–C). Femur distally with an apophysis on ventral side anda retrolateral concavity. RTA broad, with sharp apex, base with a triangular process dorsally. Embolus slender, needle-like, slightly curved. Tegular apophysis sclerotized and thumb-shaped, situated at the apex of the bulb, separate from the embolus base.

Figure 5.

Otacilia yangmingensis sp. n. A left male palp, ventral view B same, dorsal view C same, prolateral view D same, retrolateral view E epigyne, ventral view F same, cleared by potassium hydroxide, ventral view G vulva, dorsal view.

Figure 6.

Otacilia yangmingensis sp. n. A left male palp, ventral view B same, dorsal view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view. Scale bars equal for A and B, equal for D and E.

Female (Fig. 4C–D). Total length 3.27–4.29 (n = 5). One paratype: body 4.29 long; carapace 1.72 long, 1.44 wide; abdomen 2.57 long, 1.62 wide. Carapace yellowish brown. Eye diameters: AME 0.11, ALE 0.10, PME 0.09, PLE 0.10. Eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.11, PME–PLE 0.05, ALE–PLE 0.11. MOA 0.26 long, front 0.24 wide, back 0.31 wide. Clypeus 0.13 high. Leg measurements: I 6.63 (1.71, 0.65, 1.91, 1.56, 0.80); II 5.48 (1.44, 0.60, 1.42, 1.28, 0.74); III 4.67 (1.24, 0.56, 0.97, 1.20, 0.70); IV 7.29 (1.90, 0.63, 1.76, 2.00, 1.00). Leg formula: 4123. Femur I with two dorsal spines and four prolateral spines, femur II with one dorsal spine and three prolateral spines, femora III–IV with one dorsal spine; tibia I with eight pairs of ventral spines, tibia II with eight proventral spines and seven retroventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen light grey, anterior half without dorsal scutum, posterior half dark with several indistinct chevron-like black stripes dorsally. Other characters as in male.

Epigyne (Figs 5E–F, 6D): median plate narrow, with parallel lateral margin; copulatory openings situated centrally, covered with mating plugs (Fig. 5E), connected with a pair of shallow concavities anteriorly, and the concavities have distinct anterior and inner lateral margins. Vulva (Figs 5G, 6E): copulatory ducts thick, posteriorly swollen, connected to a pair of large, transparent long ovoid bursae; spermathecae located posteriorly and small, close to each other; bursae and spermathecae connected by slender, slightly curved connecting tubes.

Distribution

Known only from the type localities, Hunan, China (Fig. 13).

Otacilia curvata sp. n.

http://zoobank.org/EFCA1B66-8035-41A4-BB6F-634B4F16BB01

Figs 7, 8, 9

Type material

Holotype ♂, China, Hunan Province: Shuangpai County, Mt. Yangming, around the Forest Park Service (26°03'36.698"N, 111°56'12.707"E), 539 m a.s.l., 24 September 2015, Chi Jin leg. Paratypes: 5♀3♂, same data as for holotype; 2♀4♂, Shuangpai County, Mt. Yangming, Wanshou Temple (26°06'27.490"N, 111°55'19.186"E), 1375 m a.s.l., 26 September 2015, Chi Jin leg.; 2♀1♂, Shuangpai County, Mt. Yangming, Hongjun Pavilion (26°04'34.924"N, 111°56'19.223"E), 1324 m a.s.l., 27 September 2015, Xiangbo Guo and Jingchao He leg.

Etymology

The specific name is derived from the Latin “curvatus”, meaning curved and refers to the shape of the DTA of the male palp; adjective.

Diagnosis

The male can be distinguished from all other longituba group species, except O. bifurcata Dankittipakul & Singtripop, 2014, O. loriot Jäger & Wunderlich, 2012 and O. namkhan Jäger & Wunderlich, 2012, by having a long RTA and a long DTA and can be distinguished from them by the needle-like embolus (embolus of these three species claw-like, knife-shaped and semicircular respectively) (Figs 8A–D, 9A–C). The female of the new species can be easily distinguished from all of the other longituba group species, except O. microstoma Wang et al., 2015, by the copulatory ducts longitudinal and close together, and it can be distinguished from O. microstoma by the present of glandular appendages and sigmoid connecting tubes (glandular appendages absent and connecting tubes V-shaped in O. microstoma) (Figs 8E–G, 9D–E; Wang et al. 2015: figs 1D–E, 2F–G).

Description

Male (Fig. 7A–B). Total length 2.51–2.80 (n = 5). Holotype: body 2.67 long; carapace 1.37 long, 1.15 wide; abdomen 1.30 long, 0.96 wide. Carapace yellowish brown, with black marginal bands; middle with broad longitudinal black stripe, from ocular area to the posterior margin of carapace; fovea longitudinal, dark brown. Diameter of eyes: AME 0.08, ALE 0.09, PME 0.06, PLE 0.10. Eye interdistances: AME–AME 0.03, AME–ALE 0.01, PME–PME 0.08, PME–PLE 0.06, ALE–PLE 0.05. MOA 0.19 long, front 0.19 wide, back 0.20 wide. Clypeus 0.12 high. Chelicerae with two strong anterior bristles; promargin with three well-separated teeth and retromargin with five denticles close to each other. Labium and sternum dark yellow. Legs light yellowish brown; all femora with distal black annulus; patellae I–II all black, patellae III–IV absenting black patches; tibia I almost all black, tibiae II–IV with black proximal and distal annulus; metatarsus I distal half part black, metatarsi II–IV with black distal annulus. Measurements of legs: leg I 4.95 (1.31, 0.51, 1.42, 1.21, 0.50), II 3.90 (1.06, 0.40, 1.02, 0.91, 0.51), III 3.36 (0.86, 0.44, 0.68, 0.86, 0.52), IV 4.90 (1.29, 0.45, 1.09, 1.41, 0.66). Leg formula: 1423. Femora I–III lack dorsal spines, femur IV with one dorsal spine, femur I with three prolateral spines; tibia I with six proventral spines and seven retroventral spines, tibia II with six proventral spines and five retroventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen oval, dorsum black, anterior half with a narrow dorsal scutum, posterior half with several chevron-like black stripes; venter light grey.

Figure 7.

Otacilia curvata sp. n. A male habitus, dorsal view B same, ventral view C female habitus, dorsal view D same, ventral view.

Palp (Figs 8A–D, 9A–C). Femur distally with an inflated hump on ventral side. RTA thick in proximal part and abruptly tapering at half of its length. DTA with anterior and posterior margins parallel in proximal part from the dorsal view, then abruptly curved to the prolateral side of bulb, tapering and with an enlarged blunt apex. Embolus short, needle-like. Conductor membranous, close to and as long as the embolus. Tegular apophysis absent but with a tegular ridge.

Figure 8.

Otacilia curvata sp. n. A left male palp, ventral view B same, dorsal view C same, prolateral view D same, retrolateral view E epigyne, ventral view F same, cleared by potassium hydroxide, ventral view G vulva, dorsal view.

Figure 9.

Otacilia curvata sp. n. A left male palp, ventral view B same, dorsal view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view F schematic course of internal duct system. Scale bars equal for A and B, equal for D and E.

Female (Fig. 7C–D). Total length 2.77–2.85 (n = 7). One paratype: body 2.77 long; carapace 1.41 long, 1.20 wide; abdomen 1.36 long, 1.01 wide. Eye diameters: AME 0.08, ALE 0.09, PME 0.07, PLE 0.10. Eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.07, PME–PLE 0.07, ALE–PLE 0.07. MOA 0.21 long, front 0.18 wide, back 0.19 wide. Clypeus 0.11 high. Leg measurements: I 5.11 (1.31, 0.54, 1.46, 1.29, 0.51); II 4.10 (1.10, 0.49, 1.03, 0.97, 0.51); III 3.46 (0.91, 0.43, 0.73, 0.86, 0.53); IV 5.08 (1.35, 0.50, 1.12, 1.41, 0.70). Leg formula: 1423. Femur II with one dorsal spines and two prolateral spines, tarsus II with six proventral spines and five retroventral spines, other segments with the same spination as male. Abdomen light grey, anterior half lacks dorsal scutum. Other characters as in male.

Epigyne (Figs 8E–F, 9D): median plate absent; copulatory openings situated centrally, tiny. and trumpet-shaped. Vulva (Figs 8G, 9E–F): copulatory ducts longitudinal, connecting with a pair of large, transparent, long, ovoid bursae; spermathecae located posteriorly, small and ovoid, close to each other; bursae and spermathecae connected by strong, curved, sigmoid connecting tubes. Glandular appendages present, as long as the diameter of one spermatheca.

Distribution

Known only from the type localities, Hunan, China (Fig. 13).

Otacilia submicrostoma sp. n.

http://zoobank.org/64BE3E6B-B7E9-40EB-A1F0-39A01D85D844

Figs 10, 11, 12

Type material

Holotype ♂, China, Hunan Province: Sangzhi County, Bamaoxi Town, Mt. Tianping, Watch Tower (29°47'11.854"N, 110°05'28.838"E), 1626 m a.s.l., 15 September 2015, Chi Jin leg. Paratypes: 11♀7♂, same data as for holotype; 19♀19♂, Sangzhi County, Bamaoxi Town, Mt. Tianping (29°46'07.921"N, 110°04'22.159"E), 1330 m a.s.l., 16 September 2015, Xiangbo Guo and Jingchao He leg.; 2♀6♂, Sangzhi County, Bamaoxi Town, Mt. Tianping (29°46'35.332"N, 110°05'54.474"E), 1520 m a.s.l., 17 September 2015, Chi Jin leg.

Etymology

The species is named for its similarity to O. microstoma Wang et al., 2015; adjectival.

Diagnosis

The male can be distinguished from all other longituba group species, except O. mira Fu, Zhang & Zhang, 2016, O. mustela Kamura, 2008 and O. parva Deeleman-Reinhold, 2001, by having only one tibial apophysis and no conductor and can be distinguished from them by the RTA base with a small triangular process (Figs 11A–D, 12A–C). The female of the new species can be easily distinguished from all of the other longituba group species by the long, S-shaped connecting peculiar tubes (Figs 11E–F, 12D).

Description

Male (Fig. 10A–B). Total length 2.65–2.99 (n = 33). Holotype: body 2.99 long; carapace 1.52 long, 1.29 wide; abdomen 1.47 long, 1.04 wide. Carapace yellowish brown, with black marginal bands; fovea longitudinal, brown. Eye diameters: AME 0.09, ALE 0.10, PME 0.09, PLE 0.10. Eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.11, PME–PLE 0.05, ALE–PLE 0.08. MOA0.22 long, front 0.21 wide, back 0.30 wide. Clypeus 0.15 high. Chelicerae with two strong anterior bristles; promargin with three well-separated teeth and retromargin with seven denticles close to each other. Labium and sternum dark yellow. Legs light yellowish brown, all femora, patellae, tibiae, metatarsi distally with black annulus. Measurements of legs: leg I 5.45 (1.42, 0.54, 1.55, 1.30, 0.64), II 4.54 (1.20, 0.47, 1.18, 1.08, 0.61), III 3.96 (1.04, 0.44, 0.83, 1.03, 0.62), IV 5.72 (1.56, 0.50, 1.26, 1.57, 0.83). Leg formula: 4123. Femur I with two dorsal spines and four prolateral spines, femur II with one dorsal spine and one prolateral spine, femora III–IV with one dorsal spine; tibia I with six proventral spines and seven retroventral spines, tibia II with six pairs of ventral spines; metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen oval, dorsum black, anterior half with a narrow dorsal scutum, posterior half with several black transverse stripes; venter light grey, with black scattered patches.

Figure 10.

Otacilia submicrostoma sp. n. A male habitus, dorsal view B same, ventral view C female habitus, dorsal view D same, ventral view.

Palp (Figs 11A–D, 12A–C). Femur distally with an apophysis on ventral side anda retrolateral concavity. RTA broad, with relatively sharp apex extending along the cymbium retrolaterally, basally with a small triangular process. Embolus slender, needle-like. Tegular apophysis and conductor absent.

Figure 11.

Otacilia submicrostoma sp. n. A left male palp, ventral view B same, dorsal view C same, prolateral view D same, retrolateral view E epigyne, ventral view F same, cleared by potassium hydroxide, ventral view G vulva, dorsal view.

Figure 12.

Otacilia submicrostoma sp. n. A left male palp, ventral view B same, dorsal view C same, retrolateral view D epigyne, ventral view E vulva, dorsal view F schematic course of internal duct system. Scale bars equal for A and B, equal for D and E.

Female (Fig. 10C–D). Total length 3.02–3.48 (n = 32). One paratype: body 3.48 long; carapace 1.60 long, 1.36 wide; abdomen 1.88 long, 1.25 wide. Carapace yellowish brown. Eye diameters: AME 0.09, ALE 0.09, PME 0.10, PLE 0.10. Eye interdistances: AME–AME 0.04, AME–ALE 0.01, PME–PME 0.10, PME–PLE 0.06, ALE–PLE 0.09. MOA 0.25 long, front 0.20 wide, back 0.29 wide. Clypeus 0.14 high. Leg measurements: I 5.71 (1.47, 0.59, 1.64, 1.40, 0.61); II 4.87 (1.28, 0.52, 1.20, 1.23, 0.64); III 4.11 (1.09, 0.47, 0.85, 1.04, 0.66); IV 5.98 (1.60, 0.53, 1.33, 1.64, 0.88). Leg formula: 4123. Femur I with two dorsal spines and four prolateral spines, femur II with one dorsal spine and two prolateral spines, femora III–IV with one dorsal spine; tibiae and metatarsi I and II with the same spination as male. Abdomen light grey, anterior half lacking dorsal scutum, posterior half dark with several indistinct chevron-like black stripes dorsally. Other characters as in male.

Epigyne (Figs 11E–F, 12D): median plate absent; copulatory openings situated centrally, tiny and pore-like. Vulva (Figs 11G, 12E–F): copulatory ducts thick and short, connected with a pair of large, transparent, long, ovoid bursae; spermathecae located posteriorly, large and ovoid, close to each other; bursae and spermathecae connected by strongly curved, S-shaped connecting tubes. Glandular appendages present, as long as one spermatheca’s diameter.

Distribution

Known only from the type localities, Hunan, China (Fig. 13).

Figure 13.

Distribution of new species the genus Otacilia from Hunan, China.

Acknowledgments

Thanks to Xiangbo Guo and Jingchao He for their assistance during the field work in Hunan Province, China. The English of the manuscript was kindly reviewed by Dr J. MacDermott. This work was supported by the National Natural Science Foundation of China (No. 31372154), and by the Program of Ministry of Science and Technology of the Republic of China (2015FY210300).

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